#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
extern int a;
int main()
{
	int a = 0;
	int b = 0;
	int c = 0;
	scanf("%d %d %d", &a, &b ,&c);
	int d = a + b +c;
	printf("d=%d", d);

	return 0;
}
